Stability problems with "Arial Unicode MS" Font

[pierre vaures]

Mrs. Mr.

We use the Font "Arial Unicode MS" version 0.84 and version 0.86 
with windows NT4 on PC Pentium 450 MHZ.

Sometimes, usually when a locking screen occurs, the font is lost.
Meaning, instead of characters, squares appear on the GUI.

Any hint, clues about this problem will be very welcome.


Regards


Pierre